Entanglement entropy and the Fermi surface.

@article{Swingle2010EntanglementEA,
  title={Entanglement entropy and the Fermi surface.},
  author={Brian Swingle},
  journal={Physical review letters},
  year={2010},
  volume={105 5},
  pages={050502}
}
Free fermions with a finite Fermi surface are known to exhibit an anomalously large entanglement entropy. The leading contribution to the entanglement entropy of a region of linear size L in d spatial dimensions is S∼L(d-1)logL, a result that should be contrasted with the usual boundary law S∼L(d-1). This term depends only on the geometry of the Fermi surface and on the boundary of the region in question. I give an intuitive account of this anomalous scaling based on a low energy description of… CONTINUE READING

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